Road-surfacing machine



. C. J. HUG

ROAD SURFACING MACHINE Filed 80- 2'7.- 192] 2 Sheets-Sheet. 1

jufiy 29. m4. 1,502,825

. C. J. HUG

ROAD SUBFACING MACHINE W) yank/vs Patented July 29, 1924.

UNITED STATES PATENT OFFICE.

CHRISTIAN J. HUG, F HIGHLAND, ILLINOIS, ASSIGNOR TO THE HUG COMPANY, OFHIGHLAND, ILLINO'IS, A CORPORATION OF ILLINOIS.

ROAD-SURFACING MACHINE.

Application filed December 27, 1921. Serial No. 524,876.

T 0 all whom it may concern Be it known that I, CHRISTIAN J. HUG, acitizen of the United States, residing at Highland, in the county ofMadison and State of Illinois, have invented certain new and usefulImprovements in Road-Surfacing'Machines, of which the following is asoecification, reference being had therein to the accompanying drawing.

My invention relates to improvements in roadsurfacing machines and hasfor its object to provide a mechanism to WOIi (by tamping) the surfaceof a concrete pavement, by means of a traveling, vibrating tamping tool.

Drawings.

Fig.1 is a plan view of a machine embodying my invention, parts beingbroken away. Fig. 2 is a side elevation of the same, parts being brokenaway. Fig. 3 is a front elevation of the same, parts being broken away.Fig. 4 is an enlarged detail of the tamping-tool, carrying roller andthe chain for vibrating the same.

Description.

The machine of my invention embodies the traveling frame supported bythe driving wheels 1111 and rear wheels 1212; the wheels traveling uponthe sideforms or kerbs 13, between which the coinposition pavement 14(of concrete or the like) has been laid, whose upper face is intended tobe worked or surfaced; the frame 10 carries the platform 15, upon whichthe motor 16 is supported. The power of the motor shaft 17 is conveyedto the jack-shaft 18 by means of the reciprocal transmission gearindicated as 19, the connecting shaft 20 and the bevel gears 2122. Uponthe jack-shaft 18 is the sprocket 23 from which the chain 24 drives thesprocket 25, the shaft 26 and worm 27, the worm 27 engaging with thegear 28 on the shaft 29, on which shaft 29 the wheels 1111 are mounted.

The tamping tool 30 comprises a series of slats 31, grouped in multiplesupon a series of faces, said slats 31 being arranged parallel to eachother and spaced apart as shown in Fig. 3.

The tool 30 is mounted between chains 3232 which carry blocks 33 inwhich the axle 34 is carried, the tool 30 being so mounted that its axisis inclined at an angle to its path of travel.

It is desired to rotate the tool 30 by a series of impulses, so thatthere shall be a lull while the tool is in the position shown in Fig. 3with the slats 31 upon the bottom face of the tool 30 in contact withthe surface of the pavement 13. This is accomplished by means of thedrive illustrated, the chains 32 being mounted on the sprockets 3535driven by the gear 36, the gear 36 in turn being driven by the mutilatedgear 37 driven by the chain 38 from the sprocket 39 on the jack shaft18.

The blocks 33 are supported on small wheels 40, said wheels 40 travelingin succession upon the lower track 41 and the upper track 42, which aredisposed within the frame 10 as indicated in Figs. 2 and 3. The tracks4141 are adjustable vertically by means of the eye-bolts 43 (see Fig.2), and when elevated, the tracks 41 serve to hold the tool 30 out ofcontact with the surface of the pavement. This adjustment is made forthe purpose of transporting the machine in inoperative condition. Itwill be understood that any desired number of the tools 30 may beemployed in any one machine.

The tool 30 being in the position illustrated in Fig: 3, it is desiredto impart vertical vibratory movement thereto. This is accomplished bymeans of a chain belt 44, each of whose links is of such size as topermit the periphery of the wheel 40 to extend through the link and restupon the track 41. Thus the passage of the chain 44 imparts a verticaljolt to the tool 30 as the wheel 40 is made to jump out of one link, andinto the next link, of the chain-belt 44. The chain-belt 44 is mountedas shown in Figs. 2 and 3, its upper half resting and traveling upon theupper face of the track 41, the chain-belt 44 being driven by thesprocket 45 and chain 46 from the sprocket 47 on the jack shaft 18.

Claims:

1. In a road surfacing machine a tamping tool comprising a rotatablebase having a series of peripheral plane faces; parallel slats mountedon said faces; and means comprising a mutilated gear for successivelycontacting and holding said faces upon the surface being worked.

'2. In a road surfacing machine a tamping tool comprising a rotatablebase having a series of peripheral plane faces; parallel slats mountedon said faces; and means comprising a mutilated gear for successivelycontacting and holding said faces upon the surface being Worked; incombination with a track carrying said tamping tool and means forelevating said track to hold said tamping tool out of Working position.

3. In a surfacing machine, a tamping tool having a plurality of flatfaces, and means for rotating said tool to bring said faces successivelyin contact with the surface to be Worked, and means for impartingvertical vibratory movement to said tool.

4. In a surfacing machine, a traveling frame; an endless chain carriedthereby and mounted transversely of the path of travel of the frame; arotatable tamping tool can ried by said chain; and means for rotatingsaid tool by a series of impulses and for vibrating said tool While itsbottom face is in contact with the surface of the pavement.

5. In a road surfacing machine a tamp ing tool having a series ofperipheral plane faces; a series of parallel slats grouped in multipleson each of said faces; and means embodying a mutilated gear for rotatingsaid tool and holding said faces successively in contact with the Work.

In testimony whereof I hereunto aflix my signature.

CHRISTIAN J. HUG.

